Reamer



- Feb. 22,1927.

s. "H. NORTON,

REAMER Filed July 9, 1924 v 2 Sheets-Sheet 2 Patented Feb. 22, 19 27.

UNITE l FFICE.

SAMUEL HARRY NonToN, or irEAnvrLLE, PENNSYLVANIA.

REAMER.

Application filed July 9, 1924. SerialNoi 724,938.

This invention relates to reamers of the adjustable type.

An important object of this invention s to provide a reainer wherein the blades and the pilots associated with the blades may be quickly and conveniently adjusted by. the

turning of a single collar. v

A' further object of the invention 1s to provide a reamer wherein the blades and pilots are connected for adjustment by means of individual leaf springs wh1ch not only act as a connecting means for the pilots and blades but also effectively hold the blades and pilots in the grooves in the body ofthe reamer. I

A further object is to produce a reamer which is durable,.convenient to adjust and cheap to manufacture.

Other, objects and advantages will be apparent during'the course of the following description. 7

In the accompanying drawing formin a part of this application. and in which like V Figure is a vertical transverse section taken on line 5-5 of Figure 2;

adjusting collar;

' Figure 6 is a perspective of aleaf spring for holding the forward portion of a forward pilot in position; 1 p V Figure 7 is a perspective of a leaf spring for connecting a blade and a forward pilot and for holding these parts in position;

. Figure 8 is a perspective, of one. of the springs for connecting the rear pilots to the Figure 9-is a fragmentary sideelevation of the reamer illustrating the novel form of lead' I F igure IQ is a perspective illustrating a blade embodied in-the invention Figure 11 is anend plevation-illustrating the blades positioned for grinding;

Figure 12 is a transverse" sectional view through the reamer illustrating the blades in position for cutting.

In the drawing. wherein for the purpose of illustration 2. preferred embodiment of the invention is shown, the numeral 5, desige nates a more or lesscylindrical body having a series of longitudinally extendinggrooves 6 which gradually deepen toward the forward portion of the body and which adjustably receive forward rear pilots 9. i

In carrying out the invention the blades and the pilots are connected for simultaneous adjustment so that the cutting diameter of the reainer may be varied.

The forward portions of the pilots? are formed with notches more or less l-shaped in side elevation to receive the inwardly hooked terminals 10 of retaining springs 11.

pilots 7,- blades ,8 and The forward portions of the retaining springs 11 are provided with laterally extending shoulders 12 which ride over thei'periphery of the 'bofdy of the reamer. However, it will be observed that the major portions of the springs 11 are'received in the grooves 6 and consequently are held in po+ sition thereby. The leaf springsll are engaged bya fiat vendless ring 14 which surrounds thebody and which extends into depressions15 in the intermediate portions of the springs 11. As the endless ring 14 is extended into the depressions 15 sliding of the ring on the springs is positively prevented.

The rear portions of the pilots 7 V and the forward portions of the blades 8 are provided with notches 17 and 18 respectively for the reception of the inturned terminal portions 19 of individualleafsprings 20,

The major portions of the leaf springs 20 are received in the grooves 6 and are. held against lateral movement by the side walls of the grooves. The leaf springs 20 are urged inwardly by an endless ring 2l-seat'ed in depressions28 in the intermediate por tions of the individual leaf springs 20.; :It'

will be seen that the individual leaf springs 20 not only serve as a means to'hold the.

pilots and the blades against accidental out: ward movement but also cause the pilots and the blades to move together. r

In carrying out theinvention the rear pox.

tions of the blades -8 fand the forward por-;

tions of the rear pilots 9 are provided with the notches 18 and 17 respectively for the reception of the inturned ends 19 of the in dividual leaf. springsf20.

The rear portions of the pilots 9- are pro vided. with notch-es 26 for the. reception of inturned terminal portions 28 of individual movement of the leaf springs.

leaf-springs 30.

The rear portions of the individual leaf springs 30 are inwardly offset and are provided with outwardly directed hooks 33 received in an internal groove 34 in the forward portion of an adjusting collar 35.

The individual leaf springs 30 are provided in advance of the hooks 33 with laterally extending shoulders 38 which ride over the body and thereby limit the inward The intermediate portions of the leaf springs are formed with depressions 36 to partly receive a connecting ring 37 by means of which the indlvidual springs are all held 1n an operative position.

In use the blades 8 and the pilots 7 and 9 are positioned in the gradually deepening grooves 6 and are connected by means of the several springs as clearly illustrated in Figure 1. The collar is now adjusted longitudinally on the threaded rear portion of the reamer body to position the cutters and the pilots for making a cut'of the desired diameter.

By'simply adjusting the collar 35 on the reamer body the blades and pilots will simultaneously move. The particular con nection between the blades and the pilots provides for accurate movement of the reamer and positively prevents one element from partaking of movement with respect to another element.

/Vith reference-to Figures 9, 10, 11 and 12, it will be observed that the relief or clearance 4L0on the several blades 8 may be formed by positioning the blades within a circle somewhatsmaller in diameter than the diameter of the hole it is" intended to ream. are subsequently moved outwardly to their normal cutting positions. The cutting edge of-each blade will be on center or behind a line passing through center and all a the blades will have the proper clearance.

;fl-l1e-'- forward ,-;portionof each cutting blade is formedrwith-a-notch 42 of more "or less triangular formation and being in one side-*of the blade. The side. wall'of the notch 42-co-0perates with the circular I ground cleara'nceAO-in the formation of a more or less spiral lead 44; That is to say, by cir:

cular grinding the. clearance on the blades thespiral leads will be formed at the same time and-bythe -same-operation.- The lead thus formed is somewhat similar to-thecutting edge of ale-ft hand reamer and may be more expeditiously and economically formed than byresent known methods of' grind.- ing. .Ofcourse any suitable .angle may be employed informing the leads by means .of.

i which the reamer isgui'ded; into .the hole and ,enabled to :cut the Wall 1 of] the hole.

.Tarticular attentionis directed tothe. fact The blades are circular ground and hold the same in engagement with .said

blades and said pilots. I j

2. A reamer comprising a body having grooves, aligned separate work engaging members positioned in the grooves and having their ends formed with notches, individual leaf springs having their terminal portions received in said notches and having their intermediate portions formed with depressions, and endless rings surrounding the reamer body and said leaf springs and received in said depressions. V

A reamer compri 'ng a body having grooves, aligned work engaging members positioned in the grooves and havingnotch-es, individual leaf springs having their terminal portions received in said notches and having their intermediate portions formed with depressions, and endless rings sur-. rounding the reamer body and said leaf springs and received in said depressions, certain of said individual leaf springs havinglaterally projecting shoulders riding on the surface of said body. 3

4. A reamer comprising a body having grooves, aligned work engaging 'members positioned in the grooves, and having notches, individual leaf springs having terminal portions connected to said work engaging members and rings surrounding-the reamer body and said leaf springs, certain of said individual lea-f springshaving lat erally projecting ;sh'oul ders riding ever -he surface of said body' an d-a'f cellar a'djust tie on said body and havi-ngAconnec-tion; v t it said springs, 'whereby the adjustment if said collar onsaid bodyresultsinthe siniul taneous longitudinal and radial movementof all of said-work engaging members and the springs associated.therewith. I

5. A reamer comprising a body, aligned workingengaging members movable longitudinallyof the-bo,d-y,theendportions ofsaid work engaging members being pro.-..

vided with notches,leaf springs having their terminal portions hooked and received in said-notches, the intermediate portions of said leaf springs being formed withdepressions, rings surroundingthe leaf springs and received in. said depressions, said springs forming'a mean for holding saidworklen gaging members in position, and means associated with certain of said leaf springs for moving the work engaging members and the leaf springs longitudinally of the body together.

6. A reamer comprising 'a body, work engaging members movable longitudinally and radially with respectto the body and having notches, separate leaf'springs having hooks received in said notches, portions of said springs being formed with laterally extending shoulders slidably contacting with the surface of the body, and rings engaged with said springs to hold the work engaging members in position.

7 A reamer comprising a body, work engaging members associated with the body and having notches, individual leaf springs having hooks received in said notches, said springs being formed with laterally extending shoulders riding onthe surface of the body to hold the springs in place, and rings engaged with said springs to tension the same and to hold the work engaging members in position, said leaf springs being provided with means to hold the ring against sliding movement on the springs.

8. A reamer comprising a body having grooves, work engaging members received in said grooves and having notches, leaf springs having their end portions hooked and received in said notches, said leaf springs be.-

'ing formed with depressions, and means re ceived 1n sa1d depresslons for tensroning the springs and'for holding the same in position partly in said grooves, the ends of said depressions forming stops to hold said means in place.

9. A reamer comprising a body having grooves, work engaging members in said grooves, leaf springs partly received in said grooves and held against lateral movement by the side walls of said grooves and having terminal portions engaged with said work engaging members, said leaf springs having outwardly directed hooks, and an adjusting collar having an internal groove receiving said outwardly directed hooks.

10. A reamer comprising a body having grooves, work engaging members in said grooves, leaf springs partly received in said hooks, and a tensioning ring engaging said springs and holding the same in position.

11. A reamer comprising a body having grooves, individual springs connected to said work engaging members, an adjusting collar on said body and having connection with said individual springs whereby the work engaging members are movable with said collar, and a ring surrounding said body and engaged with said springs.

12. A reamer comprising a body having grooves, work engaging members in said grooves, springs connected to said work engaging members, an adjusting collar having connection with said springs, and a ring engaged with said springs, the intermediate portions of said springs being provided with means limiting the movement of said ring longitudinally of said springs.

13. The construction set forth in claim 11, said springs being provided with laterally projecting shoulders riding on the surface of said body to limit the inward movement of the springs.

' 14. A reamer comprising a body having grooves, a plurallty of aligned work engaging Inembersin each of said grooves, separately formed springs detachably engaged at engaging members in each of said grooves, 'means connectmg the work engaging members for movement together, and an adjusting device for simultaneously adjusting-the aligned work engaging members. In testimony whereof I affix my signature. SAMUEL HARRY NORTON.

"6O grooves, work engaging members in said 

